A Design Method for Rock Biaxial Compression Blasting

Abstract

The invention discloses a rock biaxial compression blasting design method. The method comprises the following steps: step S1: obtaining the basic mechanical parameters of the rock; Theoretical modeling of the dynamic mechanical response; step S3: the rock mass under the condition of plane strain and plane stress is subjected to uniform horizontal confining pressure P x and vertical confining pressure P y During the action, use the classic Kirsch method to calculate the static stress distribution around the blast hole; Step S4: Under the plane strain condition, when the inner wall of the blast hole is subjected to the blast load, use the Laplace transform method to solve the dynamic response of the blast hole; solve The problems of the lack of theoretical basis, design guidance of experimental parameters, heavy workload and confining pressure loading method are easy to damage rock samples in previous testing methods.

Description

technical field

[0001] The invention relates to the field of rock biaxial compression blasting design, in particular to a rock biaxial compression blasting design method. Background technique

[0002] With the process of urbanization and the development of industrialization, the resources in the shallow part of the earth are gradually exhausted, and the surface environment continues to deteriorate. The main battlefield for human development and utilization of resources is constantly shifting to the deep part of the earth. Drilling and blasting method (drilling and blasting method) is widely used in various underground tunnel excavation and mining activities due to its strong adaptability to rock geological conditions and low excavation cost. It is generally believed that during the excavation of underground space, the rock will be in the following two stress states: one is the plane stress state, which mainly exists at the tunnel excavation boundary, and its characteristic i...

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